Chapter 3 Specifications; Communication Specifications - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

3
SPECIFICATIONS
This chapter explains the specifications of MODBUS serial communication.
3.1

Communication Specifications

MODBUS serial communication is executed within the specifications shown in the table below. The baud rate, etc. can be
changed in the parameter settings of GX Works3.
Item
Number of connectable units
Communication Communication
specifications interface
Baud rate
Data length
Parity bit
Stop bit
Transmission distance
Communication
protocol
Master function Number of
connectable slaves
Number of functions
Number of
simultaneous sending
messages
Maximum number of
writes
Maximum number of
reads
Slave function Number of functions
Number of messages
which can be received
simultaneously
Station number
3 SPECIFICATIONS
16
3.1 Communication Specifications
Specifications
Built-in RS-485 port
FX5-485-BD
FX5-485ADP
Up to 4 Channel
(Only one channel for the master)
RS-485
300/600/1200/2400/4800/9600/19200/38400/57600/115200 bps
8 bit
None, odd or even
1 bit/2 bit
1200 m (3937' 0") or less for the
system configured with FX5-485ADP
only
50 m (164' 0") or less for the system
configured with devices other than
above
RTU
32 slaves
8 (No diagnosis function)
1 message
123 words or 1968 coils
125 words or 2000 coils
8 (No diagnosis function)
1 message
1 to 247
FX5-232-BD
FX5-232ADP
RS-232C
15 m (49' 2") or less
1 slave
Remarks
The channel can be used as
master or slave.
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The transmission distance
varies depending on
communication equipment
type.
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The number of slaves varies
depending on communication
equipment type.
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